Before Steelwill's graphical update, he had a mohawk and a flail that shot magic projectiles at enemies, and had a unique death animation along with his fellow bodyguards. After the update, he now has a hammer. Along with the graphical update, his death animation is similar to that of a goblin.

Although the examine text says "A battle-honed goblin", Sergeant Steelwill, along with his fellow bodyguards, have considerably lower health then the goblins fighting Zamorak's forces outside.